could sack
Verbo regular: sack - sacked- sacked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could sack
you could sack
he could sack
we could sack
you could sack
they could sack 	I could be sacking
you could be sacking
he could be sacking
we could be sacking
you could be sacking
they could be sacking	I could have sacked
you could have sacked
he could have sacked
we could have sacked
you could have sacked
they could have sacked	I could have been sacking
you could have been sacking
he could have been sacking
we could have been sacking
you could have been sacking
they could have been sacking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not sack
you could not sack
he could not sack
we could not sack
you could not sack
they could not sack 	I could not be sacking
you could not be sacking
he could not be sacking
we could not be sacking
you could not be sacking
they could not be sacking	I could not have sacked
you could not have sacked
he could not have sacked
we could not have sacked
you could not have sacked
they could not have sacked	I could not have been sacking
you could not have been sacking
he could not have been sacking
we could not have been sacking
you could not have been sacking
they could not have been sacking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I sack?
could you sack?
could he sack?
could we sack?
could you sack?
could they sack? 	could I be sacking?
could you be sacking?
could he be sacking?
could we be sacking?
could you be sacking?
could they be sacking? 	could I have sacked?
could you have sacked?
could he have sacked?
could we have sacked?
could you have sacked?
could they have sacked? 	could I have been sacking?
could you have been sacking?
could he have been sacking?
could we have been sacking?
could you have been sacking?
could they have been sacking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not sack?
could you not sack?
could he not sack?
could we not sack?
could you not sack?
could they not sack? 	could I not be sacking?
could you not be sacking?
could he not be sacking?
could we not be sacking?
could you not be sacking?
could they not be sacking? 	could I not have sacked?
could you not have sacked?
could he not have sacked?
could we not have sacked?
could you not have sacked?
could they not have sacked? 	could I not have been sacking?
could you not have been sacking?
could he not have been sacking?
could we not have been sacking?
could you not have been sacking?
could they not have been sacking?